Affiliation:
1. Department of Chemical and Biomolecular Engineering University of Illinois at Urbana‐Champaign Champaign IL 61801 USA
Abstract
AbstractThe design of molecularly selective membranes is of paramount importance in the electrochemical separation of organic acids from complex fermentation streams, due to the presence of multicomponent species. However, current membrane‐integrated electrochemical technologies have relied on ion‐exchange membranes that lack intrinsic ion‐selectivity, thus preventing their application for value‐added recovery of organic acids from competing ions. Here, this study demonstrates a layer‐by‐layer polyelectrolyte functionalization approach for controlling ion‐selectivity, to achieve the multicomponent separation of organic acids in a redox‐flow electrodialysis platform. This study carries out a detailed investigation of the surface morphology and physicochemical properties of functionalized membranes, underlying that the selectivity of organic acids can be precisely tuned through the control of the hydrophilicity, electrostatic repulsion, and steric hindrance. Tailoring of membrane physiochemical properties enables up to complete retention of succinate, while enhancing the total flux. This organic acid retention is extended to the control over mono‐ and multivalent organic acids. Integration of functionalized membrane with the redox‐flow system allows selective succinic acid recovery with 99.7% purity from a synthetic fermentation mixture, high energy efficiency, and membrane stability. Modulation of ion‐selectivity through membrane functionalization coupled with electrochemical architecture design enables a sustainable pathway for multicomponent separations in biomanufacturing.
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献